End of round bale twine guides

ABSTRACT

A round baler having a wrapping apparatus for wrapping bales with twine includes a twine dispenser moveable generally between the sidewalls for dispensing at least one strand of twine around the bale. The wrapping apparatus further includes a retractable twine guide for spacing the twine wrapped around the bale a certain distance from one of the sidewalls. The guide is shiftable into and out of an operating position, in which the guide engages and maintains the twine the distance from the one sidewall. The operating position of the twine guide is generally within or proximate to the path of inflowing crop material so that shifting of the guide out of the operating position minimizes interference with the flow of material and reduces accumulation of trash and material on the guide.

CROSS-REFERENCE TO RELATED APPLICATIONS

See also the following contemporaneously filed applications for U.S.Letters Patent: Ser. No. 08/731,768, entitled ROUND BALER HAVINGTAILGATE-RESPONSIVE CLUTCH; Ser. No. 08/731,764, entitled DOWN TURNINGSTUB AUGERS ON WIDE PICK-UP FOR ROUND BALERS; Ser. No. 08/733,758,entitled OVER-THE-TOP SUPPORT ARM FOR PICK-UP GAUGE WHEEL OF A BALER;Ser. No. 08/733,757, entitled TALL SLEEVES FOR ROUND BALER DRIVE ROLLS;Ser. No. 08/731,395, entitled EASED INLET TAILGATE ROLL ARRANGEMENT FORVARIABLE CHAMBER ROUND BALER.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to round balers utilizing twinefor wrapping successively formed bales and, more particularly, to aretractable twine guide for spacing the twine wrapped around the bale acertain distance from one of the sidewalls of the baler.

2. Discussion of Prior Art

Round balers of both the fixed and variable chamber varieties oftenutilize strands of twine to wrap a fully formed bale. However, it is awell recognized problem with such conventional balers that twine wrappedaround the extreme ends of the bale adjacent the sidewalls of the balertends to slip off the bale. As those of ordinary skill in the art willappreciate, this problem is attributable to various factors such as thedecreased crop material density at the ends of the bale. Theconvolutions of twine wrapped around the relatively inadequately formedends of the bale arc susceptible to unwrapping or may simply separatefrom the bale as the bale is discharged, transported, etc. As those ofordinary skill in the art will further recognize, this problem ismagnified in dry, crumbly hay conditions.

Detached convolutions of twine are troublesome for several reasons. Forexample, loose strands of twine are unsightly and obviously detrimentalto the salability of the bale. Moreover, the ends of the bale tend to beinsufficiently wrapped, allowing the bale to loosen and deteriorate,which is especially problematic when the bales are stacked.

Accordingly, twine guides have been provided for spacing twine wrappedaround the bale a certain distance inwardly from the sidewalls of thebaler to ensure the twine remains wrapped around the bale. However,conventional twine guides consist of stationary devices mounted to thesidewalls of the baler. Since a majority of balers utilize a twinedispenser in the form of one or more pivotal twine dispensing tubeswhich dispense twine within the inflow of crop material so that thematerial carries the twine into the baling chamber and around the bale,the twine guide is positioned between the dispensing tube and the balingchamber and generally within the path of the inflowing material.Consequently, stationary twine guides interfere with the flow of cropmaterial and are prone to collecting crop material and trash thereonwhich inhibits their twine guiding function. As those of ordinary skillin the art will appreciate, conventional twine guides are particularlyproblematic in balers utilizing a wide pickup. Wide pickups transfer andconverge a wide windrow of crop material into the baling chamber andtraditionally employ structure that congests the area within which thedispensing tube and twine guide are positioned and, more importantly,deliver a relatively heavy flow of crop material adjacent the sides ofthe baler.

OBJECTS AND SUMMARY OF THE INVENTION

Responsive to these problems, an important object of the presentinvention is to provide a baler with structure for assuring that duringthe wrapping cycle of the machinery, the endmost wraps of twine areplaced around the bale in such a manner that the wraps are preventedfrom separating from the ends of the bale. The present invention isparticularly concerned with a twine guide for spacing the endmost wrapsof twine from the end of the bale. Moreover, it is an object of thepresent invention to provide the baler with a twine guide that does notcollect crop material or trash thereon so as to maintain the twineguiding function thereof. Another object of the present invention is toprovide a twine guide which minimizes interference with the inflow ofcrop material. Additionally, an object of the present invention is toprovide a twine guide that is particularly useful with balers having awide pickup. Yet another object of the present invention is to provide atwine guide which is shiftable out of a twine guiding position so thatinterference with inflowing crop material and accumulation of cropmaterial and trash on the guide is reduced.

In accordance with these and other objects evident from the followingdescription of a preferred embodiment of the invention, the round balerincludes a wrapping apparatus having a retractable twine guide forspacing twine wrapped around the bale a certain distance inwardly fromone of the sidewalls. The twine guide is shiftable into and out of anoperating position, in which the guide is disposed to engage andmaintain the twine the distance from the one sidewall. The twine guidemay be shifted to a standby position, which is spaced substantially outof the path of inflowing crop material so that the guide does notinterfere with the flow of crop material and does not catch material andtrash thereon.

In a first embodiment, a twine dispenser, which is moveable between thesidewalls during a wrapping cycle and rests in a home position adjacentthe one sidewall between successive wrapping cycles, is operable forshifting the twine guide into its operating position. Preferably, theguiding apparatus includes an arm pivotal toward and away from the onesidewall for carrying the twine guide between its standby and operatingpositions. The twine guide is positioned adjacent an inboard end of thearm such that the arm projects inwardly beyond the one sidewall when theguide is in the operating position. Preferably, the dispenser releasablyengages the arm as the dispenser moves out of the home position forshifting the guide from the standby position to the operating position.If desired, the arm includes a tang configured for releasable engagementwith the dispenser as the dispenser moves out of the home position.

The first embodiment further preferably includes latching mechanismoperably coupled with the arm for releasably retaining the guide in itsoperating position when the mechanism is actuated. A return tensionspring is connected between the arm and the one sidewall for yieldablybiasing the guide into the standby position such that the guide shiftsfrom the operating position to the standby position when the latchingmechanism is deactuated. A stop is positioned for engagement with thearm when the guide is in the standby position for preventing the returnspring from shifting the guide beyond the standby position.

The preferred latching mechanism is disposed for operation by thetailgate, wherein the mechanism is actuated as the tailgate swings intothe closed position and is allowed to deactuate as the tailgate swingsout of the closed position. The latching mechanism includes a shiftableconnecting bar positioned for releasable engagement with the tailgate asthe tailgate swings into and out of the closed position. The tailgateengages the bar as the tailgate swings into the closed position forshifting the bar in a first direction, thereby actuating the latchingmechanism, and disengaging the bar as the tailgate swings out of theclosed position for allowing the bar to shift in the opposite direction,thereby deactuating the latching mechanism. The latching mechanismincludes structure for deactuating the latching mechanism as thetailgate swings out of the closed position, preferably in the form of atension spring connected between the bar and the one sidewall.

Preferably, the arm has a portion with a notch defined therein, whilethe latching mechanism includes a shiftable latch element configured forcomplemental latching interengagement with the notch, when the guide isin the operating position and the latching mechanism is actuated. Theportion includes a disk coaxial with the pivot axis of the arm such thatpivoting of the arm causes rotation of the disk. The disk presents asubstantially cylindrical marginal surface within which the notch isdefined. The latch element and the bar are coupled for allowing limitedrelative movement therebetween so that when the latching mechanism isactuated the latch element is allowed to shift relative to the bar.Accordingly, the latching mechanism includes a tension spring coupledbetween the bar and the latch element for yieldably biasing the latchelement against the portion of the arm when the mechanism is actuated sothat the latch element yieldably presses against the marginal surface,as the twine guide shifts from the standby position toward the operatingposition, and shifts into latching interengagement with the notch oncethe guide reaches the operating position.

In a second embodiment, the wrapping apparatus includes recoil structurefor yieldably biasing the twine guide into the operating position. Inthis respect, the twine guide may be positioned generally within thepath of the inflowing crop material when the guide is in the operatingposition, such that crop material engaging the guide shifts the guideout of the operating position against the bias of the recoil structure.The wrapping apparatus includes a shiftable support member, in the formof an elongated rod, for carrying the twine guide into and out of theoperating position. The rod is slidably received within a firstcylindrically shaped, tubular sleeve member that is fixedly connected tothe one sidewall. In this respect, longitudinal shifting of the rodrelative to the sleeve allows for adjustment of the distance the twineguide spaces the twine from the one sidewall, while rotational shiftingof the rod within the sleeve allows for shifting of the twine guide intoand out of the operating position.

The wrapping apparatus of the second embodiment further includesstructure for securing the rod in longitudinally spaced positionsrelative to the first sleeve member. Preferably, the wrapping apparatusincludes a second cylindrically shaped, tubular sleeve member slidablyreceiving the rod and a stationary retainer spaced from the first sleevemember, with the second sleeve member being disposed therebetween. Thesecond sleeve member has a pair of diametrically opposed openings andthe rod has a plurality of longitudinally spaced diametricalthrough-holes which may be selectively aligned with the openings of thesleeve. A pin is removably received within the openings and one of thethrough-holes for preventing longitudinal shifting of the rod relativeto the second sleeve member and for releasably coupling the secondsleeve member with the rod for rotational movement therewith.

A third embodiment concerns the use of power mechanism, such as ahydraulic piston and cylinder assembly, for shifting the twine guideinto and out of its operating position. The assembly is preferablyconnected between the twine cutter and the arm carrying the twine guidesuch that the assembly controls operation of the cutter and the twineguide. A sequencing circuit is provided for fluidly connecting theassembly and the piston and cylinder unit for the twine dispenser to acommon source of hydraulic pressure. The sequencing circuit controlsfluid flow to the assembly and the unit during the wrapping cycle sothat the cutter shifts to its cutting position and the twine guideshifts out of its operating position once the dispenser reaches its homeposition. Additionally, because the dispenser is preferably configuredto swing through the blades of the cutter, the sequencing circuit isalso designed to open the cutter and shift the twine guide to theoperating position before the dispenser passes the cutter.

BRIEF DESCRIPTION OF THE DRAWING FIGURES

A preferred embodiment of the invention is described in detail belowwith reference to the attached drawing figures, wherein:

FIG. 1 is a fragmentary, side elevational view of a round baleremploying a twine guide constructed in accordance with the presentinvention, particularly illustrating the components of the wrappingapparatus disposed exteriorly of the right sidewall of the baler;

FIG. 2 is an enlarged, fragmentary, side elevational view of the lowerportion of the baler illustrated in FIG. 1, again illustrating thecomponents of the wrapping apparatus disposed exteriorly of the rightsidewall of the baler;

FIG. 3 is an enlarged, fragmentary, left side elevational view of thelower portion of the baler with the left sidewall removed, particularlyillustrating internal details of construction of the baler, with thetwine guide in a retracted, standby position;

FIG. 4 is an enlarged, fragmentary, top plan view of the front of thebaler, with parts being removed to illustrate the movement of the twinedispenser between the sidewalls and the twine guide in an operatingposition;

FIG. 5 is an enlarged, fragmentary, front elevational view of the rightside of the baler, particularly illustrating the twine guide in theoperating position;

FIG. 6 is an enlarged, fragmentary, bottom view of the right side of thebaler, particularly illustrating the twine dispenser as it pivots out ofa home position and into engagement with the support arm carrying thetwine guide;

FIG. 7 is an enlarged, fragmentary, side elevational view taken frominside the right side of the baler and looking toward the inside surfaceof the right sidewall, particularly illustrating the twine guide in theoperating position, the tailgate in a closed position, and the latchingmechanism in an actuated condition as a result of the tailgate being ina closed position;

FIG. 8 is an enlarged, fragmentary, side elevational view similar toFIG. 7, but with the view being taken from outside the baler and lookingforward the outside surface of the right sidewall;

FIG. 9 is an enlarged, fragmentary, top plan view of a portion of theright side of the baler, particularly illustrating the tailgate in theclosed position, the latching mechanism responsively in the actuatedcondition, the twine guide in the operating position, and theinterengagement of the twine dispenser and the support arm after thetwine dispenser pivots out of the home position to shift the twine guideinto the operating position;

FIG. 10 is an enlarged, fragmentary, top plan view similar to FIG. 9,but illustrating the twine dispenser as it pivots beyond the twineguide,

FIG. 11 is an enlarged, fragmentary, top plan view of a portion of theright side of the baler, particularly illustrating the tailgate slightlyajar as it swings out of the closed position, the latching mechanism asit deactuates in response to raising of the tailgate, and the twineguide in the operating position;

FIG. 12 is an enlarged, fragmentary, top plan view similar to FIG. 11,but illustrating the tailgate raised slightly further than as depictedin FIG. 11, the tailgate disengaged from the latching mechanism suchthat the mechanism is deactuated, and the twine guide returned to itsstandby position;

FIG. 13 is an enlarged, fragmentary, top plan view similar to FIG. 12,but illustrating the tailgate in the closed position, the latchingmechanism responsively in the actuated condition, and the twine guide inthe standby position;

FIG. 14 is an enlarged, fragmentary, side elevational view of a lowerportion of a baler employing a second embodiment of the presentinvention, particularly illustrating the components of the wrappingapparatus disposed exteriorly of the right sidewall of the baler;

FIG. 15 is an enlarged, fragmentary, top plan view of a portion of theright side of the baler illustrated in FIG. 14, particularlyillustrating the various operating positions of the twine guide spacedinwardly from the right sidewall;

FIG. 16 is an enlarged, fragmentary, side elevational view inside thelower portion of the baler illustrated in FIG. 14, particularlyillustrating internal details of construction of the baler and showingin full lines the twine guide in the operating position;

FIG. 17 is a vertical sectional view taken along line 17--17 in FIG. 14;

FIG. 18 is an enlarged, fragmentary, side elevational view of a baleremploying a third embodiment of the present invention, particularlyillustrating the components of the wrapping apparatus disposedexteriorly of the right sidewall of the baler;

FIG. 19 is an enlarged, fragmentary, top plan view of the right side ofthe baler, particularly illustrating the twine guide in the operatingposition and the dispenser as it returns to its home position; and

FIG. 20 is a schematic diagram of the hydraulic sequencing circuitinterconnecting the hydraulic cylinders for the twine dispenser and forthe twine guide and twine cutter with a common source of hydraulicpressure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Turning initially to FIG. 1, the round baler 10 selected forillustration generally includes a chassis or frame 12 having groundwheels 14 and a forwardly extending tongue 16 that is adapted forconnection with a towing vehicle (not shown). The chassis 12 carries apair of upright, laterally spaced sidewalls 18 and 20 (see also FIG. 4)which cooperate to define a space within which bale forming and balewrapping operations may be carried out as the baler is advanced across afield. A pair of left and right frame members extend upwardly from thechassis 12 (only the right frame member 23 disposed exteriorly of theright sidewall 20 being illustrated) these members assist withsupporting the sidewalls 18 and 20 in their upright disposition. Withinthe space defined by the sidewalls 18 and 20, the baler 10 furtherincludes bale forming mechanism for compacting and rolling crop materialinto a round bale.

The sidewalls 18,20 present stationary forward portions fixed to thechassis 12 by suitable means and rearward portions swingably attached tothe forward portions by an upper pivot assembly 24. The rearwardportions of the sidewalls 18,20 cooperatively define a tailgate 26 whichis swingable between an opened, discharge position (not shown), in whichthe tailgate 26 has sufficiently raised to allow a completely formedbale to be discharged from the baler 10, and a closed, baling position(FIG. 1), in which bale forming and wrapping operations are performed. Ahydraulic cylinder 28 disposed exteriorly of each sidewall (only thecylinder corresponding with the right sidewall 20 being shown) ispivotally connected between the forward portion of the sidewall and thetailgate 26 for effecting such raising and lowering of the tailgate.

In the present embodiment, the bale forming mechanism and sidewalls18,20 cooperate to define a so-called "variable chamber," belt-typemachine, wherein the baling chamber is initially relatively small andthen grows progressively larger as the bale increases in diameter withinthe baler 10. However, the principles of the present invention areequally applicable to various other baler constructions, such as fixedchamber balers. Although the bale forming mechanism is not illustratedor described in detail herein, it will be appreciated that the variablechamber baler includes a series of cooperating belts and rolls supportedby the sidewalls 18,20 for rolling and compacting a bale as it formswithin the baler 10. As those of ordinary skill in the art willappreciate, the baler 10 is provided with a plurality of laterallyextending rolls, which include the pair of front and rear drive rolls 30and 32, idler roll 34 and pair of tailgate-mounted rear inlet rolls36,38 illustrated in FIG. 3. Furthermore, the rolls span the sidewalls18,20 and are arranged in a generally circular pattern for guiding aplurality of endless, laterally spaced, side-by-side belts 40 as thebelts 40 are driven linearly during bale formation and wrapping.

The drive rolls 30 and 32 are drivingly coupled with the power source ofthe towing vehicle to drive the belts 40 and are driven in clockwisedirections viewing FIG. 3. Furthermore, as shown in FIGS. 4 and 5, thedrive rolls 30,32 include a plurality of laterally spaced sleeves 32a(only the sleeves of the rear drive roll 32 each being of whichunderlies a corresponding belt 40. The sleeves 32a are speciallyconfigured for reducing trash and crop material accumulation between thedrive rolls 30,32 and belts 40. Furthermore, the sleeves 32a are thesubject of the contemporaneously filed application for U.S. LettersPatent entitled TALL SLEEVES FOR ROUND BALER DRIVE ROLLS, in the namesof J. Dale Anderson and LaVern Roy Goossen.

As perhaps best shown in FIG. 3, the belts 40 loop around the rear driveroll 32 and rear inlet rolls 36,38 to form a baling chamber 42 which isbounded at the sides by the sidewalls 18,20. Although not illustrated,it will be appreciated that the chamber 42 assumes an initial, generallyupright configuration, but becomes distended and circular in transverseconfiguration as the bale grows beyond its initial starting coredimensions to assume the shape illustrated in FIG. 3. Furthermore, thechamber 42 is open at the bottom to present a crop infeed opening orcrop inlet 44 that is defined between the rear drive roll 32 and theforwardmost rear inlet roll 36. It will be appreciated that the verticaland fore-and-aft spacing of the rear inlet rolls 36,38 provide an easedcrop inlet configuration that has proven particularly effective inintroducing crop material into the baling chamber 42. This eased inletconfiguration is the subject of contemporaneously filed application forU.S. Letters Patent entitled EASED INLET TAILGATE ROLL ARRANGEMENT FORVARIABLE CHAMBER ROUND BALER, in the names of Howard J. Ratzlaff, et al.

A wide crop pickup 46, supported by the chassis 12 generally below andforwardly of the crop infeed opening 44, is operable to lift cropmaterial off the ground as the baler 10 is advanced across a field. Inthe present embodiment the pickup 46 projects laterally beyond thesidewalls 18,20 so that a large windrow that is wider than the baler maybe delivered to the chamber 42. In short, the preferred pickup 46includes a rotatable tine reel 48 having a plurality of tines 50 drivenalong a path, generally denoted by numeral 52 (FIG. 3), when the pickupreel 48 is rotated. The pickup 46 further includes a generally U-shapedwrapper 54 extending generally forwardly from the chassis 12 and havinga plurality of laterally spaced slots (not shown) through whichcorresponding tines 50 project as the tines move upwardly and rearwardlyalong the path 52. The pickup can swing up and down about a transversepivot 56 (FIG. 3) to the extent necessary for accommodating changes inground contour sensed by a pair of left and right gauge wheels, 58 and60 respectively, so as to maintain the elevation of the tine reel 48.The gauge wheels 58 and 60 are secured to the pickup 46 by specialupwardly arched arms 62 and 64 respectively, such mounting arrangementfor the gauge wheels 58,60 being the subject of contemporaneously filedapplication for U.S. Letters Patent entitled OVER-THE-TOP SUPPORT ARMFOR PICK-UP GAUGE WHEEL OF A BALER, in the names J. Dale Anderson andLaVern R. Goossen.

As the crop material is picked up off the ground, it flows generallyrearwardly along the outer surface of the wrapper 54 toward a transfermechanism, generally denoted by the numeral 66, which serves tocentralize the flow of crop material from the wide pickup 46 andtransfer it to the infeed opening 44. The transfer mechanism 66preferably includes a pair of center-gathering, left and right stubaugers 68 (only one such auger being shown in FIG. 3). It will beappreciated that the augers 68 are driven to converge the flow of cropmaterial to a width generally equal to the width of the baling chamber42. A fork-type stuffer 70 having a plurality of laterally spaced prongs72 is driven by a crank 74 to move the prongs along a path, generallydenoted by the numeral 76 (FIG. 3), for transferring the converged flowof crop material rearwardly through the crop inlet 44 and into thechamber 42. An inclined ramp 78 positioned between the infeed opening 44and the wrapper 54 of the pickup 46 has a plurality of laterally spacedslots (not shown), each configured for receiving a corresponding prong72. As indicated by the path 76, the prongs 72 project through the slotsof the ramp 78 as they shift rearwardly to move crop material along theramp and into the crop inlet 44.

The pickup 46 and transfer mechanism 66 discussed hereinabove aredisclosed in greater detail in contemporaneously filed application forU.S. Letters Patent entitled DOWN TURNING STUB AUGERS ON WIDE PICK-UPFOR ROUND BALERS, in the names of Howard J. Ratzlaff and J. DaleAnderson. As those of ordinary skill in the art will appreciate, aso-called "open throat" baler is illustrated in the drawings in view ofthe fact that the throat area, generally referenced by the number 80 andleading from the front of the pickup 46 to the baling chamber 42, iscompletely open and unobstructed, without the presence of compressionrollers or the like.

As crop material is delivered to the baling chamber 42 by the pickup 46and transfer mechanism 66, the bale forming mechanism operates in theusual manner during a baling cycle to form a full size bale, which isdenoted by the numeral 82 in FIG. 3. Upon completion of the balingcycle, it is necessary to wrap the bale 82 before the tailgate 26 israised to discharge the bale from the chamber 42, and accordingly, awrapping mechanism is provided on the baler 10 for wrapping successivelyformed bales with strands of twine. The wrapping mechanism generallyincludes a twine dispensing assembly 84 (FIGS. 3-4) for dispensing atleast one strand of twine around the bale 82 during the wrapping cycle,a twine cutting assembly 86 (FIG. 2) for cutting the strand(s) of twineupon completion of the wrapping cycle, and a twine guiding assembly 88(FIGS. 2 and 4) for spacing the strand(s) of twine inwardly a distancefrom the right sidewall 20 to prevent twine from wrapping around theright end of the bale 82.

The preferred twine dispensing assembly 84 includes a "double-barrel"twine dispenser 90 having a pair of tubes 92,94 adjacent the distal endthereof for dispensing two separate strands of twine around the bale 82;although it is entirely within the ambit of the present invention toutilize a dispenser which dispenses only a single strand of twine. Theproximal end of the dispenser 90 is attached to a shaft 96 rotatablycarried within a bearing sleeve 98, which cooperatively support thedispenser for generally horizontal, pivotal movement between thesidewalls 18,20. A crank 100 is also attached to the rotatable shaft 96in a generally radially opposed orientation to the dispenser 90. Asshown in FIG. 3, the distal end of the crank 100 is pivotally connectedwith a double-acting hydraulic cylinder 102, such that extension andretraction of the cylinder imparts pivotal movement to the dispenser 90.

It will be appreciated that the dispenser 90 rests in a home positionbetween successive wrapping cycles, wherein the dispenser is disposedgenerally transverse to the fore-and-aft axis of the baler 10 with thefree end thereof projecting beyond the right sidewall 20 (shown withphantom lines in FIG. 4). A wrapping cycle may be initiatedautomatically by various sensors, such as position sensors which sensethe position of moveable rolls (not shown) corresponding to a full sizebale, or manually by the operator. Under any circumstances the wrappingcycle involves supplying hydraulic fluid to the rod end of the cylinder102 so that the cylinder retracts, thereby swinging the dispenser 90 outof the home position and toward the left sidewall 18. Retraction of thecylinder 102 continues until the dispenser 90 has reached a desiredremote position (shown with dashed lines in FIG. 4), which issufficiently spaced from the left sidewall 18 to dispense twine so thatthe left half of the bale 82 is adequately wrapped, without wrapping,the left end of the bale. Of course, the remote position may beadjustably shifted toward or away from the left sidewall (i.e., theoperator may adjust the degree of pivoting of the dispenser 90) byvarying the amount of hydraulic fluid supplied to the cylinder 102, orconnecting the cylinder 102 to the crank 100 at a position spaced closerto or further from the shaft 96. Once the dispenser 90 has pivoted intothe remote position, the flow of hydraulic fluid is reversed so that thecylinder 102 extends, thereby pivoting the dispenser 90 toward the rightsidewall 20. In the preferred embodiment, the dispenser 90 makes onlytwo passes between the sidewalls 18,20 during a wrapping cycle, pivotingfrom the home position to the remote position and then returning to thehome position.

As indicated above, the preferred dispenser 90 includes a pair of tubes92,94 for dispensing two individual strands of twine around the bale 82.Accordingly, a pair of twine balls (not shown) are stored within thebaler 10 for supplying twine to the respective tubes 92 or 94. As willbe indicated below, the twine cutting assembly 86 is configured forcutting the twine after a wrapping cycle so that the individual twinestrands dangle freely from the respective tubes 92 or 94 (FIGS. 2 and3). Accordingly, as the dispenser 90 initially swings out of the homeposition, the dangling ends of the twine strands are placed within theopen throat 80 and, more importantly, within the path of inflowing cropmaterial such that the material pulls the twine strands into the balingchamber and around the bale 82 as the dispenser pivots between thesidewalls 18,20.

Turning particularly to FIG. 2, it is necessary to sever the strands oftwine once the wrapping cycle has completed, and accordingly, the twinecutting assembly 86 is disposed for operation by the dispenser 90 to cutthe twine as the dispenser returns to the home position. The cuttingassembly 86 forms no part of the present invention, per se, andtherefore is not described or illustrated in detail. Suffice it toexplain that the preferred cutting assembly 86 includes an operatinglever 104 disposed exteriorly of the right sidewall for temporaryoperating connection with the dispenser 90 as the latter approaches thehome position. The operating lever 104 is fixed to a rotatable sleeve106 for swinging movement about a horizontal axis. Sleeve 106 alsosupports a connecting link 108, such that swinging movement of the lever104 causes swinging movement of the link 108, and vice versa. The actualcutting mechanism preferably takes the form of a scissor-type cutterhaving an upper stationary blade 110 and a lower movable blade 112 thatis swingable alongside the upper blade 110 and into cuttinginterengagement therewith. An angled rod 114 is connected between thelower blade 112 and a bell crank 116 for imparting swinging movement tothe lower blade 112 as the crank 116 rotates about bolt assembly 118. Anadjustable turnbuckle 120 is pivotally coupled between the bell crank116 and the connecting link 108, whereby swinging of the operating lever104 causes rotation of the crank 116. Finally, a tension spring 122 isconnected between the right sidewall 20 of the baler 10 and theconnecting link 108 for yieldably biasing the link 108 and operatinglever 104 rearwardly (leftwardly viewing FIG. 2), which in turn biasesthe turnbuckle 120 leftwardly, the bell crank 116 in a counterclockwisedirection (viewing FIG. 2) and the lower blade into the open positionillustrated in FIG. 2.

Accordingly, as the dispenser 90 returns to its home position, itengages the operating lever 104 and swings the lever forwardly(rightwardly viewing FIG. 2) against the bias of spring 122.Furthermore, the strands of twine extending from the dispenser 90 intothe baling chamber 42 are placed between the blades 110,112 of thecutting mechanism as the dispenser 90 pivots to the home position. Thecutting assembly is configured so that once the dispenser 90 reaches itshome position, the lower blade 112 has swung into cuttinginterengagement with the upper blade, thereby severing the twinedisposed therebetween. It will be appreciated that the turnbuckle 120may be lengthened or shortened by the operator to ensure thisrelationship exists. If desired, the operating lever 104 may beconstructed as a leaf spring for preventing the dispenser 90 fromexcessively swinging the lever 104 and damaging the cutting assembly 86.

While the dispenser 90 rests in the home position between successivewrapping cycles, the blades 110,112 remain interengaged. However, at thebeginning of each wrapping cycle, the dispenser 90 pivots out of thehome position, performing the bias of spring 122 to swing the operatinglever 104 rearwardly (leftwardly viewing FIG. 2). Eventually, thedispenser 90 disconnects from the operating lever 104 and the blades110,112 remain in the open position, as depicted in FIG. 2, until thedispenser once again returns to the home position. In this respect, withthe twine cutting assembly 86 disposed exteriorly of the right sidewall20 and the dispenser 90 projecting beyond the sidewall 20 in the homeposition, the dangling strands of twine are not within the inflowingcrop material during bale formation. In other words, the strands oftwine are spaced outside the open throat 80 between successive wrappingcycles. Additionally, the blades 110,112 are spaced sufficiently awayfrom the dispenser 90, when the dispenser is in its home position, toproduce dangling strands of twine after severance thereof which aresufficiently long to be disposed within the path of inflowing cropmaterial as the dispenser pivots from the home position to the remoteposition.

TWINE GUIDING ASSEMBLY 88

The twine guiding assembly 88 includes a retractable twine guide 124 forspacing end wraps of the twine a certain distance from the rightsidewall 20; that is to say, the twine guide 124 prevents twine fromwrapping around the right endmost extremity of the end of the bale 82.The twine guide 124 preferably consists of an angled rod having a lowerhook section 124a which projects slightly inwardly when the guide is inan operating position (see FIG. 5) to catch the twine and ensureengagement therewith as the dispenser 90 pivots toward the rightsidewall 20. The twine guide 124 is retractable in the sense that theguide is shiftable into and out of the operating position, in which theguide engages and maintains the strands of twine the aforementioneddistance from the right sidewall 20. In the present embodiment, thetwine guide 124 is also shiftable to a retracted, standby position(perhaps best shown in FIG. 6), in which the guide is disposed generallyadjacent the sidewall 20. It will be appreciated that in the standbyposition, the twine guide 124 is disposed sufficiently out of the pathof inflowing crop material to reduce interference with the crop materialflow and accumulation of trash and material thereon.

A horizontally swingable guide arm 126 is provided for carrying thetwine guide 124 between its operating and standby positions, with anupper threaded end of the guide 124 being secured to the arm 126 bylocking fastener 128. The arm 126 is supported for such swingingmovement by a support plate 130 attached to the underside of a generallyhorizontally, outwardly projecting lip 20a of the right sidewall 20(FIG. 6). As specifically shown in FIG. 8, an upright, tubular sleeve132 fixedly connected to the support plate 130 rotatably receives apivot shaft 134 that projects downwardly through the plate 130 andconnects with the arm 126, such that rotation of the shaft 134corresponds with swinging of the arm 126. The shaft 134 also extendsupwardly beyond the sleeve 132 for fixed reception within a disk 136,whereby rotation of the disk 136 also corresponds with swinging of thearm 126. The generally cylindrical peripheral surface of the disk has anotch 138 defined therein, the purposes of which will be describedhereinbelow. Of course, the principles of the present invention areequally applicable to various other structure for carrying the twineguide between the operating and standby positions, such as alongitudinally shiftable arm.

The shaft 134 is connected to the arm 126 generally medially along thelength thereof, with the twine guide 124 positioned adjacent the inboardend of the arm 126, such that the arm projects generally inwardly beyondthe right sidewall 20 when the guide is in the operating position (FIG.5), and lies substantially parallel to the right sidewall when the guideis in the standby position (FIG. 13). Adjacent the inboard end of thearm 126, a tang 140 depends downwardly from the underside of the arm. Asbest shown in FIG. 9, the tang 140 (illustrated in phantom) isconfigured for releasable, temporary engagement with the twine dispenser90 as the latter pivots out of its home position, which, as will befurther described hereinbelow, renders the dispenser 90 operable forshifting the twine guide 124 into the operating position. The tang 140includes a downwardly tapering edge 140a which faces inwardly when theguide 124 is in its operating position (see FIG. 5). It will beappreciated that as the twine dispenser 90 pivots into its homeposition, twine engaging the edge 140a simply slips downwardlytherealong and ultimately disengages the tang 140 so that the twine isengaged by the outwardly spaced twine guide 124.

As shown in FIG. 4, a return tension spring 142 is connected between thearm 126 and the relatively stationary baler frame member 23.Specifically, the arm 126 includes an opening 146 adjacent the outboardend thereof which receives an end of the spring 142, while an aperturedbracket 148 welded to the member 23 connects with the other end of thespring. The return spring 142 yieldably biases the arm in the clockwisedirection viewing FIG. 4 and therefore yieldably biases the twine guide124 into the standby position (FIG. 6 and 13). A stop in the form of abolt assembly 150 fastened to the lip 20a of the right sidewall ispositioned for engagement with the arm 126 when the twine guide 124 isin the standby position (FIGS. 6 and 13) for preventing the returnspring 142 from shifting the guide 124 beyond the standby position.

The twine guiding assembly 88 further includes a latching mechanism,generally denoted by the numeral 152, for releasably retaining the twineguide 124 in its operating position when the mechanism is actuated. Asshown in FIG. 9, the mechanism 152 generally includes a latch bar 154having a forwardmost end (rightwardmost end viewing FIG. 9) configuredfor complemental latching interengagement with the notch 138 in the disc136 of arm 126, a relatively longer connecting bar 156 configured forreleasable engagement with the tailgate 26 as the tailgate swings intoand out of the closed position, and an intermediate bar 158 fixed to theconnecting bar 156 for longitudinal shifting therewith.

Tuning first to the latch bar 154, a pair of frontal (adjacent the rightend of the bar viewing FIG. 9) and medial elongated slots, 160 and 162respectively, are defined within the latch bar. An upright lug 164,attached to the support plate 130 by suitable means such as welding,supports a horizontal bolt assembly 166 having a brass bushing 168 thatis slidably received within the frontal slot 160 for guiding andlimiting longitudinal shifting of the latch bar. The latch bar 154fixedly carries a horizontal bolt assembly 170 adjacent the rearwardmostend thereof (leftwardmost end of latch bar 154 viewing FIG. 9). Forpurposes which will be discussed below, the bolt assembly 170 includes abrass bushing 172.

The connecting bar 156 is generally L-shaped, with the relativelyshorter leg thereof projecting generally transverse to the fore-and-aftaxis of the baler 10 for ensuring engagement with the tailgate 26. Apush plate 174 is attached to the tailgate 26 in a position for engagingthe inturned shorter leg of the connecting bar 156 as the tailgate 26swings into and out of the closed position. If desired, the push plate174 may be adjustably attached to the tailgate 26 for further ensuringthe operable engagement between the tailgate 26 and connecting rod 156.A support bracket 176 secured to the right sidewall 20 by suitable meanssuch as welding includes an opening (not shown) configured for slidablyreceiving the connecting bar 156, thereby assisting with supporting theconnecting bar in the illustrated disposition. A pair of front and rearbolt assemblies, 178 and 180 respectively, are fixed to the connectingbar 156, with the front bolt assembly 178 having a brass bushingslidably received within the medial slot 162 of the latch bar 154. Eachof the bolt assemblies 178 and 180 include a respective spacer 182 and184 for spacing the connecting bar 156 and intermediate bar 158 from oneanother.

The bolt assemblies 178,180 are also fixed to the intermediate bar 158such that the intermediate bar 158 longitudinally shifts with theconnecting bar 156, and vice versa. An elongated fore-and-aft slot 186defined within the intermediate bar 158 slidably receives the brassbushing 172 associated with the latch bar 154.

The latching mechanism 152 includes a deactuating tension spring 188connected between the rear bolt assembly 180 and the relativelystationary support bracket 176 for yieldably biasing the connecting bar156 in the rearward direction (leftward viewing FIG. 9). As will bedescribed hereinbelow, the deactuating spring 188 serves to deactuatethe mechanism as the tailgate 26 raises out of the closed position sothat the latch bar 154 withdraws from the notch 138, thereby allowingthe return spring 142 to swing the twine guide 124 into the standbyposition (as seen by comparing FIGS. 10 and 12).

The latching mechanism further includes a latch tension spring 190connected between the bolt assembly 170 fixed to the latch bar 154 andthe front bolt assembly 178 fixed to the connecting bar 156 andintermediate bar 158 for yieldably biasing the latch bar in the forwarddirection (rightward viewing FIG. 9). As will be subsequently described,with the latching mechanism 152 actuated (i.e., with the tailgate 26 inits closed position), as the twine guide 124 shifts out of the standbyposition and into the operating position, the latch spring 190 causesthe latch bar 154 to yieldably press against the peripheral surface ofthe disk 136 and slide therealong, as the disk rotates and then shiftinto latching interengagement with the notch 138. In this respect, sincethe return spring 142 is continuously biasing the arm 126 in theclockwise direction (viewing FIG. 9) to shift the twine guide 124 intothe standby position, the operating position of the twine guide 124corresponds with the disposition of the guide (or support arm 126) atthe time the latch bar 154 shifts into latching interengagement with thenotch 138. Accordingly, if the notch 138 were repositionedcircumferentially on the disk 136 from the location illustrated in thedrawings (or if the disk were rotated relative to the arm 126), thedisposition of the twine guide 124 in its operating position wouldconsequently shift nearer to or further from the right sidewall 20.

OPERATION

It will be appreciated that at the initiation of a baling cycle, thetailgate 26 is in the closed position and the twine guide 124 rests inthe standby position, as shown in FIG. 13. Under these circumstances,the connecting link 156 and intermediate bar 158 have shifted to theirrespective forwardmost positions such that the latching mechanism 152 isactuated, whereby the latch spring 190 biases the latch bar 154forwardly against the cylindrical marginal surface of the disk 136. Thebaling cycle proceeds in the usual manner, with the pickup 46 andtransfer mechanism 66 delivering crop material to the baling chamber 42as the baler 10 is towed across the field, and the bale formingmechanism forming and compacting the delivered material into a roundbale 82. As previously described, once the bale has reached full sizethe wrapping cycle is triggered by any one of a variety of meansresponsive to the full size condition of the bale.

Upon commencement of the wrapping cycle, the twine dispenser 90 pivotsout of the home position in the direction indicated by the arrow 192 inFIG. 6. On its way out of the house portion, the dispenser 90 engagesthe tang 140 depending from the arm 126, causing the arm 126 to swing inthe direction indicated by the arrow 194 in FIG. 9 against the bias ofthe return spring 142. Consequently, the disk 136 rotates in thecounterclockwise direction (viewing FIG. 9), such that the latch bar 154yieldably pressing against the peripheral surface of the disk slidesalong the surface as the disk 136 rotates. Once the notch 138 isdisposed in the "9 o'clock" position illustrated in FIG. 9, the latchspring 190 shifts the latch bar 154 forwardly (rightwardly viewing FIG.9) into latching interengagement with the notch for retaining the twineguide 124 in the operating position.

The positions of the latch bar 154 corresponding to the standby andoperating positions of the twine guide 124 may be discerned bycontrasting FIG. 13 (standby position) and FIG. 9 (operating position).Particularly, the connecting bar 156, intermediate bar 158 andcorresponding front bolt assembly 178 remain stationary, while the latchbar 154 shifts forwardly, such that the bolt assembly 170 on the rear ofthe latch bar 154 shifts within the slot 186 of the intermediate bar,while the medial slot 162 of the latch bar 154 allows the latch bar toshift relative to the bolt assembly 178. Additionally, the bushing 168of the stationary bolt assembly 166 attached to the lug 164 slideswithin the frontal slot 160 of the forwardly shifting latch bar.

Once the twine guide 124 reaches the operating position, the twinedispenser 90 continues to pivot toward the left sidewall 18 beyond thesupport arm 126. As indicated by the phantom line in FIG. 10 depictingthe path of movement of the twine dispenser 90, in order for thedispenser to disengage the tang 140 as the dispenser swings past thesupport arm 126, the aim must swing in the counterclockwise directionslightly beyond the position illustrated in FIG. 10 (corresponding tothe operating position of the twine guide 124). Of course, the slightovertravel of the arm 126 causes the disk 136 to rotate slightly, whichin turn shifts the latch bar 154 rearwardly (leftwardly viewing FIG. 10)in a relief movement against the bias of the latch spring 190. Therespective slotted openings 160,162 and 186 of the latch bar 154 andintermediate bar 158 accommodate for such rearward shifting of the latchbar 154 while the latching mechanism 152 is actuated. Furthermore, oncethe dispenser 90 disengages the tang 140, the arm 126 and disk 136 shiftclockwise to return to the position illustrated in FIG. 10.

As previously described, the wrapping cycle of the present embodimentconsists of the twine dispenser 90 making only two passes through thebaler. However, the principles of the present invention are equallyapplicable to a twine dispenser that makes more than two passes throughthe baler. In the present embodiment, for example, such a variationsimply requires that the twine dispenser 90 not pivot to the homeposition until it is desired to actuate the twine cutting assembly 86 tosever the twine. In either case, it will be appreciated that thedangling strands of twine are not pulled by the inflowing crop materialuntil the dispenser 90 has pivoted out past the arm 126 at the beginningof the cycle. Once the twine has been pulled into the baling chamber bythe inflowing crop material, the towing vehicle is stopped, so that theinflow of crop material ceases and therefore accumulation of material onthe twine guide 124 is minimized.

The twine guide 124 remains in the operating position as the twinedispenser 90 pivots between the sidewalls. As best shown in FIGS. 4 and5, when the twine guide 124 is in the operating position, the guide isgenerally aligned along the fore-and-aft axis of the baler 10 with therear drive roll 32 (i.e., between the twine dispenser 90 and the balingchamber 42), and generally at the same elevation as the rear inlet rolls36,38. That is to say, the twine guide 124 is disposed for engaging thestrands of twine as the dispenser 90 swings in the vicinity generallydefined between the guide and the right sidewall 20 so as to prevent thetwine from wrapping around the extreme right end of the bale 82.

Accordingly, with the present embodiment, the twine guide 124 engagesthe twine wrapped around the bale and maintains the twine apredetermined distance from the right sidewall 20, as the dispenser 90returns to the home position in the direction indicated by the arrow 196in FIG. 4. However, before the twine guide 124 provides its twineguiding function, the dispenser 90 on its way home, pivots intoengagement with the tang 140 and swings the support arm 126 in thecounterclockwise direction slightly beyond the position illustrated inFIG. 4 in the manner previously described so that the dispenser may passthe arm without deactuating the latching mechanism. Additionally, beforethe twine is engaged by the twine guide 124, the twine initially engagesthe downwardly tapering edge 140a of the tang 140. As the dispensercontinues to approach the right sidewall 20, the twine slips downwardlyoff the tang 140 and is then caught by the hook section 124a of thetwine guide 124. It will be appreciated that the tang 140 also serves asa guide once the twine is caught by the hook section 124a, preventingthe twine from shifting laterally toward the left sidewall 18 beyond thetang. Once the dispenser 90 pivots past the support arm 126, twine whichwould otherwise wrap around the right end of the bale 82 is engaged bythe twine guide 124 and held out away from the right sidewall 20, asbest depicted in FIG. 4.

As the twine dispenser 90 pivots into its home position, the twinecutting assembly 86 is activated to sever the twine as previouslydescribed. Once the strands of twine have been cut, the remainder of thesevered length of twine is pulled into the baling chamber by therotating bale, while the strands of twine dangling from the dispenser 90are disposed exteriorly of the path of inflowing crop material.

Thereafter, the tailgate 26 is raised out of the closed position so thatthe wrapped bale may be discharged from the baling chamber 42. The pushplate 174 swings generally rearwardly with the tailgate 26, as indicatedby the arrow 198 in FIG. 11, allow the deactuating spring 188 to shiftthe connecting bar 156 and intermediate bar 158 rearwardly. As theconnecting and intermediate bars 156,158 initially shift rearwardly, thebrass bushing 179 of the front bolt assembly 178 slides rearwardlywithin the medial slot 162 of the latch bar 154, while the latch bar 154remains stationary such that the intermediate bar 158 slides about thebrass bushing 172 of the bolt assembly 170. In other words, the boltassembly 178 connected to the connecting and intermediate bars 156,158shifts rearwardly toward the bolt assembly 170 connected to the latchbar 154 to relieve the tension of the latch spring 190. As illustratedin FIG. 11, the bushing 179 eventually engages the rearward end of theslot 162 and the forward end of the slot 186 abuttingly engages thebushing 172 so that further rearward shifting of the connecting andintermediate bars 156,158 is imparted to the latch bar 154. Preferably,the latching mechanism is constructed so that the bushings 172 and 179"bottom out" within the respective slots 186 and 162 simultaneously;although it is only necessary to have the bushing 172 "bottom out"within the slot 186 of the intermediate bar 158 to cause the latch bar154 to shift rearwardly with the connecting and intermediate bars156,158. Even though the tension of the latch spring 192 is eventuallyrelieved, the deactuating spring 188 continues to urge the connectingand intermediate bars 156,158 rearwardly and therefore the latch bar 154rearwardly. The latch bar 154 ultimately shifts sufficiently rearwardlyto disengage the notch 138 of the disk 136, allowing the return spring142 to swing the support arm 126 toward the right sidewall 20 andthereby shift the twine guide into its standby position. It will beappreciated that although the push plate 174 eventually disengages theconnecting bar 156, rearward travel of the bars 154,156,158 is checkedby the frontal slot 160 defined within the latch bar 154, the forwardend of which abuttingly engages the bushing 168 connected to thestationary lug 164 (see FIG. 12).

After the wrapped bale has been discharged, the tailgate 26 returns toits closed position so that baling operations may be resumed. As thetailgate 26 swings into the closed position, the push plate 174 engagesthe connecting bar 156, pushing the connecting bar and intermediate bar158 forwardly (rightwardly viewing FIG. 12) against the bias of thedeactuating spring 188. The latch bar 154 also shifts forwardly as thefront bolt assembly 178 connected to the connecting and intermediatebars 156,158 pulls the bolt assembly 170 forwardly via the latch spring190. However, forward shifting of the latch bar 154 is eventuallychecked by the peripheral surface of the disk 136 (i.e., once the latchbar shifts into engagement with the disk). The connecting bar 156 andintermediate bar 158 continue to shift forwardly until the tailgate 26reaches the closed position, thereby tensioning the latch spring 190 sothat the latch bar 154 yieldably presses against the peripheral surfaceof the disk 136. In this respect, the latching mechanism 152 is onceagain actuated and baling operations may be resumed.

Although the latching mechanism 152 of the present embodiment isactuated and deactuated in response to swinging of the tailgate 16 intoand out of its closed position, it is entirely within the ambit of thepresent invention to actuate and deactuate the latching mechanism byvarious other means. For example, the latching mechanism 152 mayalternatively be coupled with the twine dispenser 90 or cutting assembly86 for deactuating the mechanism once the twine has been severed. Thelatching mechanism may also be altered or reconstructed in a variety ofways. For example, the twine guide may be spring biased into theoperating position and releasably retained in the standby position.

A second embodiment of the present invention is provided on the baler300 illustrated in FIGS. 14-17. Mounted to the right sidewall 302 of thebaler is a twine guiding assembly 301 having a retractable twine guide304 that is shiftable into and out of an operating position (shown withfull lines in FIG. 16). As with the previous embodiment when the guide304 is in the operating position, it is disposed for engaging the twineas the twine dispenser (not shown) swings toward the right sidewall 302for spacing twine, which would otherwise wrap around the right end ofthe bale, a certain distance from the right end of the bale (see alsoFIG. 15). As best shown in FIGS. 16 and 17, the twine guide 304 isdisposed generally at the same elevation as the rear inlet rolls 306,308and generally behind and below the starter roll 310 when in theoperating position. Accordingly, the twine guide 304 is disposedgenerally within the path of inflowing crop material when the guide isin the operating position; such path of material being defined by thewide pickup 312 and transfer mechanism 314 and extending generallyupwardly and rearwardly from the ground to the baling chamber 316.

The twine guide 304 is shiftable generally upwardly and rearwardly, asindicated by the arrow 318 in FIG. 16, to a substantially horizontalretracted, standby position (shown in phantom in FIG. 16). In thisrespect, it will be appreciated that the term "retractable" used hereinshall be interpreted relatively broadly. That is to say, although thetwine guide 304 does not shift out of the operating position to astandby position in which the guide is nearer to the right sidewall 302,the guide is retractable from the operating position and out of the pathof inflowing crop material to a standby position.

An elongated support rod 320 is rotatably supported on the rightsidewall 302 for carrying the twine guide 304 between its operating andstandby positions. Specifically, the rod 320 is slidably received withinan elongated, cylindrically shaped, tubular sleeve 322 that is welded toa mounting plate 324. The mounting plate is fastened to the rightsidewall 302 by a bolt assembly 326.

As illustrated in FIGS. 15 and 17, the sleeve 322 allows forlongitudinal adjustment of the support rod 320 relative thereto. In thepresent embodiment, the support rod 320 may be selectively disposed in anumber of longitudinally spaced positions relative to the first sleeve322 so that the spacing of the twine guide 304 relative to the rightsidewall 302 is adjustable. The preferred structure for allowing suchselective adjustment includes a second relatively shorter, cylindricallyshaped, tubular sleeve 328 which slidably receives the support rod 320therein. A second bolt assembly 330 spaced rearwardly from therelatively shorter bolt assembly 326, assists with fastening themounting plate 324 to the right sidewall 302 and, supports a stationaryretaining plate 332 having a claw-shaped end which fits slidably aboutthe support rod 320. It will be appreciated that the retaining plate 332and sleeve 322 rotatably retain the second sleeve 328 therebetween, whenthe support rod 320 is received within these components, for preventinglateral shifting of the second sleeve 328 relative to the right sidewall302. A tubular spacer 334 is also supported on the second bolt assembly330 for spacing the retaining plate 332 the necessary distance from theright sidewall 302. If desired, the retaining plate 332 and spacer 334may be secured to one another by suitable means such as welding.Moreover, the second sleeve 328 includes a pair of diametrically opposedopenings (not shown), and the support rod 320 includes a plurality ofcorresponding longitudinally spaced, diametrical through-holes 336(shown in phantom in FIGS. 15 and 17) which may be selectively alignedwith the openings defined in the sleeve 328. A cotter pin 338 isreceived within the sleeve openings and a selected through-hole 336 forreleasably intercoupling the support rod 320 and the second sleeve 328,thereby imparting rotational movement of the support rod 320 to thesecond sleeve 328, and vice versa. The cotter pin 338 also preventslateral shifting of the support rod 320 relative to the second sleeve328 and therefore the right sidewall 302 so as to maintain the positionof the twine guide 304 relative to the sidewall 302.

The twine guiding assembly 301 further includes structure for yieldablybiasing the twine guide 304 into the operating position, which in thepresent embodiment comprises a recoil tension spring 340. The recoilspring 340 is connected between a crank member 342 fixed to the secondsleeve 328 and a relatively stationary L-shaped bracket 344 attached tothe right sidewall 302. It will be appreciated that the recoil spring340 is configured for allowing inflowing crop material engaging thetwine guide 304 to shift the guide out of the operating position againstthe bias of the spring so as to minimize interference with the inflow ofcrop material and reduce accumulation of trash and material on the twineguide. In the present embodiment, the spacer 334 also functions as astop disposed for engaging the crank member 342 when the twine guide 304is in the standby position for preventing shifting of the guide beyondthe standby position.

Accordingly, inflowing crop material engaging the forwardly facingboundary of the twine guide 124, swings the guide out of the operatingposition in the direction indicated by arrow 318. Such swinging of theguide causes the support member 320 and second sleeve 328 to rotate inthe counterclockwise direction (viewing FIG. 16), which in turn shiftsthe crank member 342 rightwardly viewing FIG. 15 to stretch the recoilspring 340. Of course, the recoil spring 340 returns the twine guide 304to the operating position once the inflow of crop material has stopped.In this respect, the twine guide 304 is normally out of its operatingposition during bale formation as crop material is delivered to thebaling chamber 316, yet returns to the operating position as thewrapping cycle begins (i.e., once the inflow of crop material hasceased).

A third embodiment of the present invention is shown in FIGS. 18-20. Thethird embodiment includes a twine guide 400 carried on a swingable arm402 similar to the first embodiment (shown in FIGS. 1-13). However, ahydraulic cylinder 404 is provided for shifting the twine guide 400 intoand out of its operating position. As perhaps best shown in FIG. 18, thecylinder 404 is pivotally connected between the arm 402 and twine cutter406 for controlling operation of both the twine cutter and twine guide,as will subsequently be described. With respect to the twine guide 400,the rod end of the hydraulic cylinder 404 is fastened to a crank 407which is fixed to the rotatable shaft 408 carrying the arm 402.

The twine cutter 406 is also similar to the first embodiment andgenerally includes an upper stationary blade 410 and a lower blade 412selectively swingable toward the upper blade for severing twinetherebetween. Mounted to the end of the lower blade 412 is a relativelysmall triangular plate 414 which prevents the twine from slipping offthe lower blade as the blade swings upwardly to the cutting position.The linkage operably connecting the cylinder 404 with the bladesincludes a swingable crank 416 connected to the cylinder, and an angledrod 418 connected between the crank and cylinder.

Extension of the cylinder 404 swings the arm 402 toward the operatingposition of the twine guide 400 and rotates the crank 416 in acounterclockwise direction (viewing FIG. 18). The angled rod 418 in turntransfers counterclockwise rotation of the crank 416 to swingingmovement of the lower blade 412 and thereby shifts the blade out of thecutting position. A stop 420 attached to the right sidewall 422 isconfigured to engage the arm 402 for preventing swinging movement of thearm beyond the operating and retracted positions of the twine guide 400.The blades 410,412 similarly have a pin-and-slot connection 424 forlimiting swinging movement of the lower blade 412 between the cuttingand open positions of the cutter. Thus, if the cutter 406 reaches itsopen position (shown in FIG. 18) before the twine guide reaches itsoperating position, the pin will bottom out within the slot to preventfurther swinging movement of the lower blade 412 such that continuedextension of the cylinder 404 will swing the arm 402 until it engagesthe stop 420. Retraction of the cylinder 404 will conversely shift thetwine guide 400 to its retracted position and swing the lower blade 412to the cutting position. Because of the relatively small size of thehydraulic cylinder 404, the cylinder extends and retracts relativelyquickly (i.e., the arm 402 "flips" to and from the operating position).Consequently, the twine guide 400 and twine cutter 406 shift virtuallysimultaneously.

Similar to the other embodiments discussed hereinabove, swingingmovement of the twine dispenser 426 is controlled by a hydrauliccylinder 428 (shown only in FIG. 20). Furthermore, the dispenser 426 isconfigured to swing between the blades 410,412 as it passes the cutter406 for ensuring that the strands of twine are placed between the bladeswhen the dispenser is in its home position. The sequence of operation ofthe twine cutter 406 and the dispenser 426 therefore must be coordinatedso that the blades 410,412 are placed in the open position before thedispenser passes the cutter; otherwise, the dispenser will "crash" intothe blades. Of course, the operation of the twine guide 402 and thedispenser 426 must also be coordinated so that the guide is placed inits operating position before the dispenser returns to its homeposition.

In this respect, the wrapping apparatus is provided with a sequencingcircuit, generally denoted by the numeral 430 (FIG. 20), forcoordinating the sequence of operation of the twine guide 400, twinecutter 406 and twine dispenser 426. The circuit 430 has a pair of ports432 and 434 which connect to a single source of pressurized fluid,whereby the guide/cutter cylinder 404 and the dispenser cylinder 428 arecontrolled by a common fluid source. As those of ordinary skill in theart will appreciate, this configuration is particularly valuable inlight of the fact that most towing vehicles have a limited number ofhydraulic jacks for supplying pressurized fluid to the baler. As shownin FIG. 20, the ports 432 and 434 connect to a tractor remote valvewhich allows the operator to remotely control fluid supply to eitherport.

The sequencing circuit 430 includes a pair of fluid flow lines 436 and438 extending between the ports 432 and 434 and the dispenser cylinder428. Similarly, a second pair of fluid flow lines 440 and 442 areprovided for interconnecting the guide/cutter cylinder 404 and the ports432 and 434. Therefore, pressurized fluid supplied to port 432 flows tolines 436 and 440, while fluid supplied to port 434 flows to lines 438and 442. The circuit 430 further includes three pilot-operated valveassemblies, generally designated by the numerals 444, 446 and 448. Thevalve assemblies are similarly constructed, and accordingly, only one ofthe assemblies will be described in detail with the understanding thatthe other assemblies have like components. The valve assembly 444includes an adjustable relief valve 444a, a check valve 444b and acounterbalance pilot line 444c which serves to open the relief valvewhen the fluid upstream from the valve reaches the selected reliefpressure. The counterbalance pilot line 444c minimizes the risk of valveoverload when the primary pilot line fails to open the relief valve,although this is rarely a problem with the illustrated embodiment. Anadjustable flow restrictor 450 is interposed within line 436 forcontrolling the flow rate through the line 436. It will be appreciatedthat the operator is able to vary the speed of the dispenser 426, andthereby the twine spacing on the bale, by adjusting the flow ratethrough line 436.

Assuming the wrapping cycle begins with the dispenser 426 in its homeposition (i.e., the dispenser cylinder 428 fully extended), the twineguide 400 in its retracted position and the cutter in its cuttingposition (i.e., the guide/cutter cylinder fully retracted), the tractorremote valve is adjusted to supply pressurized fluid to the port 434.Pressurized fluid flows through line 442 to extend the guide/cuttercylinder 404 and thereby shift the guide 400 to its operating positionand the cutter to its open position. The fluid returning from theguide/cutter cylinder 404 flows freely through the line 440 and over thecheck valve of the assembly 448 so that the cylinder extends virtuallyimmediately. Pressurized fluid also flows through line 438 to thedispenser cylinder 428. The relief pressure of the valve 444a ispreferably set relatively low so that the pressure of pilot line 452opens the valve almost immediately. Although the valve assembly 444 doesnot restrict fluid flow returning from the dispenser cylinder 428 as itretracts, a one-way flow restrictor 454 is provided for restricting flowthrough line 436 and thereby slowing retraction of the cylinder 428.Consequently, the speed of the dispenser as it swings out of its homeposition is decreased sufficiently to allow the cutter to shift to itsopen position (i.e., allow the guide/cutter cylinder 404 to fullyextend) before the dispenser moves past the cutter. If desired, therelief pressure of the valve 444a may be set so that the valve does notopen until the guide/cutter cylinder has fully extended, in which casethe restrictor 454 may be removed.

Fluid will continue to flow through lines 436,438 until the dispensercylinder 428 is fully retracted. The valve assembly 446 prevents fluidbackflow once the dispenser has reached its remote position and thesupply to line 438 is shut off so as to prevent drifting of thedispenser out of the remote position. The valve assembly 444 also locksthe circuit when the dispenser is in its home position for preventinginadvertent drifting into and out of the home position.

The dispenser 426 is returned to its home position simply by reversingthe fluid flow from the remote tractor valve, which may be accomplishedby manual manipulation of the valve or automatic controls. In eithercase, pressurized fluid supplied to the port 432 flows through line 436and freely over the check valve 444b. As indicated above, the restrictor454 restricts flow only in one direction and therefore the fluid alsoflows freely through the restrictor toward the dispenser cylinder 428.The relief pressure for the relief valve of the assembly 446 is setrelatively low so that as soon as the pressurized fluid is supplied tothe line 436, the pilot line 456 opens the valve. Thus, the dispenser426 swings unrestricted toward its home position. The guide/cuttercylinder, on the other hand, is locked until the relief valve of theassembly 448 is opened. Particularly, fluid flow through the line 440 ischecked by the assembly 448 until the pressure of the pilot line 458 issufficient to overcome the selected relief pressure. Preferably, therelief pressure for the relief valve of the assembly 448 is setrelatively high so that the relief valve does not open until thedispenser 426 reaches its home position (i.e., until the dispensercylinder 428 is fully extended). It will be appreciated that when thedispenser 426 reaches its home position, the line 436 and pilot line 458experience a pressure "spike" which in turn causes the relief valve ofassembly 448 to open. Thereafter, the guide/cutter cylinder is retractedto actuate the cutter and shift the twine guide to its retractedposition.

The circuit 430 therefore sequences operation of the twine guide 400,the twine cutter 406, and the twine dispenser 426 for preventing thedispenser from crashing into the cutter blades 410,412 and ensuring thetwine guide is in its operating position before the dispenser returns toits home position. Further, the sequencing circuit 430 connects bothcylinders 404,428 to a common source of hydraulic pressure so that thewrapping apparatus does not consume to sources of hydraulic pressure.Such a circuit is available from the Modular Controls Division ofVickers, Inc. of Carrol Stream, Ill. as Part No. MCD-5558, labeled theCounterbalance Control Package.

The preferred forms of the invention described above are to be used asillustration only, and should not be utilized in a limiting sense ininterpreting the scope of the present invention. Obvious modificationsto the exemplary embodiments, as hereinabove set forth, could be readilymade by those skilled in the art without departing from the spirit ofthe present invention. For example, the baler may be provided with morethan one twine guide for a twine dispenser which swings beyond bothsidewalls, or when employing two dispensers for interlacing the twine.

The inventors hereby state their intent to rely on the Doctrine ofEquivalents to determine and assess the reasonably fair scope of thepresent invention as pertains to any apparatus not materially departingfrom but outside the literal scope of the invention as set forth in thefollowing claims.

What is claimed is:
 1. In a round baler having a pair of laterallyspaced apart, upright sidewalls and apparatus for wrapping a bale withtwine after the bale has been formed within the baling chamber, theimprovement comprising:a twine dispenser swingable generally between thesidewalls during a wrapping cycle for dispensing at least one strand oftwine around the bale, said dispenser resting in a home positionadjacent one of the sidewalls between successive wrapping cycles; and aretractable twine guide for spacing twine wrapped around the bale acertain distance inwardly from said one sidewall, said twine guide beingshiftable into and out of an operating position in which the guide isdisposed to engage and maintain the twine said distance from said onesidewall as the dispenser swings to the home position.
 2. In a roundbaler as claimed in claim 1,said dispenser being operable for shiftingthe guide into its operating position.
 3. In a round baler having a pairof laterally spaced apart, upright sidewalls and apparatus for wrappinga bale with twine after the bale has been formed within the balingchamber, the improvement comprising:a twine dispenser moveable generallybetween the sidewalls during a wrapping cycle for dispensing at leastone strand of twine around the bale; and a retractable twine guide forspacing twine wrapped around the bale a certain distance inwardly fromone of the sidewalls, said twine guide being shiftable into and out ofan operating position in which the guide is disposed to engage andmaintain the twine said distance from said one sidewall, said dispenserresting in a home position adjacent said one sidewall between successivewrapping cycles, said dispenser being operable for shifting the guideinto its operating position, said guide being shiftable into a retractedstandby position, in which the guide is closer to said one sidewallrelative to the operating position, said wrapping apparatus including anarm swingable toward and away from said one sidewall for carrying thetwine guide between its standby and operating positions, said twineguide being positioned adjacent an inboard end of the arm such that thearm projects inwardly beyond said one sidewall when the guide is in theoperating position, said dispenser releasably engaging the arm as thedispenser moves out of the home position for shifting the guide from thestandby position to the operating position.
 4. In a round baler asclaimed in claim 3,said inboard end of the arm including a tangconfigured for releasable engagement with the dispenser as the dispensermoves out of the home position.
 5. In a round baler as claimed in claim3,said wrapping apparatus including latching mechanism operably coupledwith the arm for releasably retaining the guide in its operatingposition when the mechanism is actuated.
 6. In a round baler as claimedin claim 5,said wrapping apparatus including return means coupled withthe arm for yieldably biasing the guide into the standby position suchthat the guide shifts from the operating position to the standbyposition when the latching mechanism is deactuated.
 7. In a round baleras claimed in claim 6,said wrapping apparatus including a stoppositioned for engagement with the arm when the guide is in the standbyposition for preventing the return means from shifting the guide beyondthe standby position.
 8. In a round baler as claimed in claim 6; andatailgate defined by rearward portions of the sidewalls that is swingableinto and out of a closed, baling position, said latching mechanism beingdisposed for operation by the tailgate, wherein the mechanism isactuated as the tailgate swings into the closed position and is allowedto deactuate as the tailgate swings out of the closed position.
 9. In around baler as claimed in claim 8,said latching mechanism includingdeactuating means for deactuating the latching mechanism as the tailgateswings out of the closed position.
 10. In a round baler as claimed inclaim 9,said latching mechanism including a shiftable connecting barpositioned for releasable engagement with the tailgate as the tailgateswings into and out of the closed position, said tailgate engaging thebar as the tailgate swings into the closed position for shifting the barin a first direction, thereby actuating the latching mechanism, anddisengaging the bar as the tailgate swings out of the closed positionfor allowing the deactuating means to shift the bar in an opposed seconddirection, thereby deactuating the latching mechanism.
 11. In a roundbaler as claimed in claim 10,said deactuating means including a firsttension spring connected between the bar and said one sidewall foryieldably biasing the bar in the second direction.
 12. In a round baleras claimed in claim 11,said arm having a portion with a notch definedtherein, said latching mechanism including a shiftable latch elementconfigured for complemental latching interengagement with the notch,when the guide is in the operating position and the latching mechanismis actuated.
 13. In a round baler as claimed in claim 12,said portion ofthe arm having a marginal surface within which the notch is defined,said latch element and said bar being coupled for allowing limitedrelative movement therebetween such that when the latching mechanism isactuated the latch element is allowed to shift relative to the bar, saidlatching mechanism including biasing means for yieldably biasing thelatch element against the portion of the arm when the mechanism isactuated so that the latch element yieldably presses against themarginal surface, as the twine guide shifts from the standby positiontoward the operating position, and shifts into latching interengagementwith the notch once the guide reaches the operating position.
 14. In around baler as claimed in claim 13,said biasing means including a secondtension spring coupled between the bar and the latch element.
 15. In around baler having a pair of laterally spaced apart, upright sidewallsand apparatus for wrapping a bale with twine after the bale has beenformed within the baling chamber the improvement comprising:a twinedispenser moveable generally between the sidewalls during a wrappingcycle for dispensing at least one strand of twine around the bale; and aretractable twine guide for spacing twine wrapped around the bale acertain distance inwardly from one of the sidewalls, said twine guidebeing shiftable into and out of an operating position in which the guideis disposed to engage and maintain the twine said distance from said onesidewall, said wrapping apparatus including recoil means for yieldablybiasing the twine guide into the operating position.
 16. In a roundbaler having a pair of laterally spaced apart, upright sidewalls andapparatus for wrapping a bale with twine after the bale has been formedwithin the baling chamber, the improvement comprising:a twine dispensermoveable generally between the sidewalls during a wrapping cycle fordispensing at least one strand of twine around the bale; and aretractable twine guide for spacing twine wrapped around the bale acertain distance inwardly from one of the sidewalls, said twine guidebeing shiftable into and out of an operating position in which the guideis disposed to engage and maintain the twine said distance from said onesidewall, said wrapping apparatus including recoil means for yieldablybiasing the twine guide into the operating position; and crop deliverymechanism for transferring crop material along a path that extendsgenerally rearwardly and upwardly from the ground and into the balingchamber, said twine guide being disposed generally within the path ofthe material when the guide is in the operating position, whereby cropmaterial engaging the guide shifts the guide out of the operatingposition against the bias of the recoil means.
 17. In a round baler asclaimed in claim 16,said wrapping apparatus including a shiftablesupport member for carrying the twine guide into and out of theoperating position, said support member being adjustably mounted to thebaler for allowing adjustment of said distance the twine guide spacesthe twine from said one sidewall.
 18. In a round baler as claimed inclaim 17,said support member including an elongated rod projectinginwardly beyond said one sidewall, with the twine guide positionedadjacent an inner end thereof, said wrapping apparatus including a firstcylindrically shaped, tubular sleeve member fixedly connected to saidone sidewall and slidably receiving the rod therein such thatlongitudinal shifting of the rod relative to the sleeve allows foradjustment of said distance the twine guide spaces the twine from saidone sidewall and rotational shifting of the rod within the sleeve allowsfor shifting of the twine guide into and out of the operating position.19. In a round baler as claimed in claim 18,said support memberprojecting generally horizontally beyond said one sidewall, said twineguide extending generally downwardly from the support member when theguide is in the operating position such that crop material engaging thetwine guide swings the guide generally upwardly and rearwardly out ofthe operating position.
 20. In a round baler as claimed in claim 18,saidwrapping apparatus including adjustment means for securing the rod inlongitudinally spaced positions relative to the first sleeve member foradjustment of said distance the twine guide spaces the twine from saidone sidewall.
 21. In a round baler as claimed in claim 20,saidadjustment means including a second cylindrically shaped, tubular sleevemember slidably receiving the rod, a stationary retainer spaced from thefirst sleeve member, with the second sleeve member being positionedtherebetween, said second sleeve member having a pair of diametricallyopposed openings and said rod having a plurality of longitudinallyspaced diametrical through-holes which are selectively aligned with saidopenings, and a pin removably received within the openings and one ofthe through-holes for preventing longitudinal shifting of the rodrelative to the second sleeve member and for releasably coupling thesecond sleeve member with the rod for rotational movement therewith. 22.In a round baler as claimed in claim 21,said recoil means including afourth tension spring connected between the second sleeve member andsaid one sidewall.
 23. In a round baler as claimed in claim 22,saidsecond sleeve member including a plate projecting outwardly therefrom;and a stationary limiting element positioned for engagement with theplate when the twine guide is in the operating position for preventingthe bias of the fourth tension spring from shifting the guide beyond theoperating position.
 24. In a round baler having a pair of laterallyspaced apart, upright sidewalls and apparatus for wrapping a bale withtwine after the bale has been formed within the baling chamber, theimprovement comprising:a twine dispenser moveable generally between thesidewalls during) a wrapping cycle for dispensing at least one strand oftwine around the bale; and a retractable twine guide for spacing twinewrapped around the bale a certain distance inwardly from one of thesidewalls, said twine guide being shiftable into and out of an operatingposition in which the guide is disposed to engage and maintain the twinesaid distance from said one sidewall; a swingable arm carrying the twineguide into and out of its operating position; and power mechanismoperably coupled with the arm for shifting the guide into and out of itsoperating position.
 25. In a round baler as claimed in claim 24,saidpower mechanism comprising a hydraulic piston and cylinder assemblypivotally connected to said arm such that extension and retraction ofthe assembly swings the arm.
 26. In a round baler as claimed in claim24,a hydraulic piston and cylinder unit coupled with the dispenser formoving the dispenser between the sidewalls; and a sequencing circuit forfluidly connecting the piston and cylinder assembly and the piston andcylinder unit to a common source of pressurized fluid.
 27. In a roundbaler as claimed in claim 26, anda twine cutter including a pair ofrelatively shiftable blades and linkage connected to at least one of theblades, said piston and cylinder assembly being pivotally connectedbetween said arm and said linkage such that extension and retraction ofthe assembly swings the arm and shifts the cutter.
 28. In a round baleras claimed in claims 27,said sequencing circuit controlling fluid flowto said assembly and said unit so that the assembly shifts the twineguide out of its operating position and the cutter to a cutting positiononce the dispenser returns to its home position.
 29. In a round baler asclaimed in claim 28,said dispenser being configured to pass between theblades of the cutter as the dispenser moves out of its home position,said sequencing circuit controlling fluid flow to said assembly and saidunit so that the assembly shifts the twine guide to the operatingposition and the cutter out of its cutting position before the dispensermoves past the cutter.
 30. In a round baler, the improvementcomprising:a mobile frame supporting a pair of upright laterally spacedsidewalls; bale forming components cooperating with the sidewalls todefine a baling chamber within which a bale is formed; a twine dispensermoveable generally between the sidewalls during a wrapping cycle fordispensing at least one strand of twine around the bale, said dispenserresting in a home position between successive wrapping cycles; a twinecutter for severing the twine at the end of each wrapping cycle; aretractable twine guide for spacing twine wrapped around the bale acertain distance inwardly from one of the sidewalls, said twine guidebeing shiftable into and out of an operating position in which the guideis disposed to engage and maintain the twine said distance from said onesidewall; a swingable arm carrying the twine guide into and out of itsoperating position; and power mechanism operably coupled with the armfor shifting the guide into and out of its operating position.
 31. In around baler as claimed in claim 30,said power mechanism comprising ahydraulic piston and cylinder assembly pivotally connected to said armsuch that extension and retraction of the assembly swings the arm. 32.In a round baler as claimed in claim 31;a hydraulic piston and cylinderunit coupled with the dispenser for moving the dispenser between thesidewalls; and a sequencing circuit for fluidly connecting the pistonand cylinder assembly and the piston and cylinder unit to a commonsource of pressurized fluid.
 33. In a round baler as claimed in claim32,said sequencing circuit controlling fluid flow to said assembly andsaid unit so that the twine guide shifts to its operating positionbefore the dispenser returns to its home position.
 34. In a round baleras claimed in claim 31,said cutter including a pair of relativelyshiftable blades and linkage connected to at least one of the blades,said piston and cylinder assembly being pivotally connected between saidarm and said linkage such that extension and retraction of the assemblyswings the arm and shifts the cutter.
 35. In a round baler as claimed inclaim 34,said cutter being shifted toward a cutting position and saidarm being swung in a direction to shift the twine guide out of itsoperating position when the assembly is retracted.
 36. In a round baleras claimed in claim 34,a hydraulic piston and cylinder unit coupled withthe dispenser for moving the dispenser between the sidewalls; and asequencing circuit for fluidly connecting the piston and cylinderassembly and the piston and cylinder unit to a common source ofpressurized fluid.
 37. In a round baler as claimed in claim 36,saidsequencing circuit controlling fluid flow to said assembly and said unitso that the assembly shifts the twine guide out of its operatingposition and the cutter to a cutting position once the dispenser returnsto its home position.
 38. In a round baler as claimed in claim 37,saiddispenser being configured to pass between the blades of the cutter asthe dispenser moves out of its home position, said sequencing circuitcontrolling fluid flow to said assembly and said unit so that theassembly shifts the twine guide to the operating position and the cutterout of its cutting position before the dispenser moves past the cutter.39. In a round baler as claimed in claim 38,said sequencing circuitincluding a pair of ports connectable to the source of pressurizedfluid, a first pair of fluid lines connecting the piston and cylinderassembly to the ports, and a second pair of fluid lines connecting thepiston and cylinder unit to the ports.
 40. In a round baler as claimedin claim 39,said sequencing circuit including a one-way flow restrictorinterposed within the second pair of lines for restricting fluid flowthrough the unit as the dispenser swings out of its home position andthereby ensuring the assembly shifts the cutter out of its cuttingposition before the dispenser moves past the cutter.
 41. In a roundbaler as claimed in claim 40,said sequencing circuit including apilot-operated valve interposed within the first pair of lines forpreventing fluid flow through the assembly until the dispenser returnsto its home position.
 42. In a round baler as claimed in claim 41,saidsequencing circuit including a second pilot-operated valve interposedwithin the second pair of lines for preventing fluid flow through theunit unless pressurized fluid is supplied to one of the ports.
 43. In around baler, the improvement comprising:a mobile frame supporting a pairof upright laterally spaced sidewalls; bale forming componentscooperating with the sidewalls to define a baling chamber within which abale is formed; a twine dispenser moveable generally between thesidewalls during a wrapping cycle for dispensing at least one strand oftwine around the bale, said dispenser resting in a home position betweensuccessive wrapping cycles; a twine cutter for severing the twine at theend of each wrapping cycle; a retractable twine guide for spacing twinewrapped around the bale a certain distance inwardly from one of thesidewalls, said twine guide being shiftable into and out of an operatingposition in which the guide is disposed to engage and maintain the twinesaid distance from said one sidewall; and power mechanism operablycoupled with the twine guide for shifting the guide into and out of itsoperating position, said power mechanism being operably coupled betweenthe twine guide and the cutter for controlling shifting of the guide andsevering of the twine.
 44. In a round baler as claimed in claim 43,saidpower mechanism comprising a hydraulic cylinder.